All retrospective rating groups approved by the department prior to July 25, 1999, under RCW 51.16.035 as it existed prior to July 25, 1999, remain approved and, with the exception of RCW 51.18.020, are subject to the provisions of this chapter.[ 1999 c 7 s 7.]
Retrospective rating groups—Department approval.
RCW 51.18.060 — under Chapter 51.18 Retrospective rating plan..
RCW 51.18.060